JackNyfe, the developer of an application that lets users rate, search, copy and comment on links on any web site within a social-network framework, has raised $3.8 million in second-round funding from Altos Ventures and undisclosed others, reports peHub. Not much is known about the Hillsborough, Calif. company. Even its site is pretty spare, except for the careers section, which lists several engineering and design positions.